Remove newrelic_rpm gem dependency
Remove newrelic_rpm gem dependency

There is no direct integration (as of yet), so removing this extra baggage, which enables usage for other monitoring services.

fabn/new_relic_ping,fabn/heartbeat_rails,jeremyolliver/new_relic_ping,fabn/heartbeat_rails,fabn/new_relic_ping,fabn/heartbeat_rails,fabn/new_relic_ping,jeremyolliver/new_relic_ping